I am so glad that you were watching him for warning signs and got him treatment quickly.
I have been offline for most of the past week because my grandma, who is like a mother to me, passed away on Thursday night. She has been battling several diseases for a long time, but it was fairly sudden. It is devastating and leaves a hole in you - I hope that you get to spend tons of time with him.
Sorry to hear about your Grandma, Angie. Sympathies sent your way.